The Morning Set, Milk and Spring (2013)

A middle-aged salaryman is going to meet a young lady called Haru one day. He intends to revive his youthful passion. His friend who grew up with him dies. His friend left him a voice-mail just before dying. The message spoke about their past. The message claimed that he knew the truth about a case that involved the two of them. His friend's message also spoke about his first love - who happens to be his friend's first love too.